Excessive rains do not cause droughts. Droughts are characterized by a lack of precipitation over an extended period of time, leading to water shortages. Excessive rainfall can instead lead to flooding, which is a separate weather phenomenon.
high rainfall
Rain provides essential water for maize crops to grow, but excessive rainfall can lead to flooding which can damage maize crops by causing waterlogging, nutrient leaching, and increased likelihood of diseases. Heavy rainfall and floods can also delay planting and harvesting, reducing maize yields and quality in South Africa. Farmers may have to adapt their planting schedules and drainage systems to mitigate the impacts of excessive rain and floods on maize production.
Floods
Rain is the precipitation of water droplets from clouds, resulting from the condensation of moisture in the atmosphere. Floods occur when water overflows onto land that is usually dry, often due to heavy rainfall, rapid snowmelt, or inadequate drainage. Both phenomena are interconnected; excessive rainfall can lead to flooding, which can cause significant damage to ecosystems, infrastructure, and communities. Effective management and forecasting are essential to mitigate the impacts of floods.
Flash floods are characterized by water collecting rapidly from heavy rainfall in a short period of time. They can happen in a matter of minutes and are dangerous due to their sudden onset and incredible force.
Floods and cyclones are both natural disasters that can cause significant damage, but they differ in their nature and causes. Floods result from excessive rainfall, melting snow, or dam failures, leading to the overflow of water onto normally dry land. In contrast, cyclones are intense circular storms characterized by low atmospheric pressure, strong winds, and heavy rain, typically forming over warm ocean waters. While floods can occur independently of cyclones, they often accompany cyclones as a consequence of the heavy rains associated with these storms.
Most flash floods occur after late afternoon rainfall.
Natural floods occur due to excessive rainfall, melting snow, or overflowing rivers, leading to the inundation of land. Man-made floods are typically caused by human activities such as dam failures, urbanization, deforestation, or inadequate stormwater management, resulting in increased surface runoff and flooding.
An excessive amount of water that covers typically dry land is known as a flood. Floods can be caused by various factors, such as heavy rainfall, snowmelt, or dam failure, and can result in significant damage to property and infrastructure.
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Freak and excessive rainfall in localised areas, running off high level landscapes and thus swelling rivers beyond their ability to contain the additional millions of litres.